from visual import *
from visual.graph import *
from random import *

gd=gdisplay(xmin=0,xmax=1.0,ymin=0,ymax=1.0,
            title="Sierpinski triangle",
            height=600,width=600,x=0,y=200,
            foreground=color.black, background=color.white)

xplot=gdots(color=color.blue)
x=0.0
y=0.0
K=3.0
a= arange(K)
b= arange(K)
c= arange(K)
d= arange(K)
e= arange(K)
f= arange(K)
a[0]=0.5
b[0]=0.0
c[0]=0.0
d[0]=0.5
e[0]=0.0
f[0]=0.0
a[1]=0.5
b[1]=0.0
c[1]=0.0
d[1]=0.5
e[1]=0.5
f[1]=0.0
a[2]=0.5
b[2]=0.0
c[2]=0.0
d[2]=0.5
e[2]=0.25
f[2]=0.5
xplot.plot(pos=(x,y))

while(1):
    rate(500)
    dum=randint(0,2)
    x=a[dum]*x+b[dum]*y+e[dum]
    y=c[dum]*x+d[dum]*y+f[dum]
    xplot.plot(pos=(x,y))